<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="app"></div>
</body>
<script src="../01_渲染器实现/render.js"></script>
<script src="../02_响应式系统/reactive.js"></script>
<script src="./index.js"></script>
<script>
  // 1.创建根组件
  const App = {
    data: reactive({
      counter: 0
    }),
    render() {
      return  h('div', null, [
        h('h2', null, `${this.data.counter}`),
        h('button', { 
          onClick: () => {
            this.data.counter++
          }
        }, '+1')
      ])
    }
  }

  // 2.挂载根组件
  const app = createApp(App)
  app.mount('#app')
</script>
</html>